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Yeah, agreed but I would not be surprised at all if that was "the chart" he was referring to. Thank you all for your info, I just needed to some backing to get a different engineer involved.

Yeah hence my question.

Yeah he doesnt know it. Just said it was on a chart...

Hi I am in NYC, we are building a few single family homes. Our Architect is calling for a 3" combined line for SP and DOM service. The houses are detached - 24'x54' with 3 floors with a total of 34 heads. we brought in a street plumbing for pricing on the street mains and he is telling us we...

are you saying the pressure loss is 10% ?

I am trying to size up the gas lines for a bunch of 115k btu Furnaces - 115 CFH. and would like to know if the sizing charts in NFPA 54 can be used, and how the pressure loss due to elevation effects things if it does at all. I will simplify the question as the details are not that important...

Ok, but pressure in the city can vary tremendously like from 85 psi in north manhattan down to 40 psi and lower in other areas, yet DEP has their "allowable flow" Is the allowable flow a challengeable subject ? Allowable is a funny term - it sounds like they are saying its the max - you mean to...

um no - the difference in cost between a 3" wet connection/service line and an 1-1/2" tap is about $10,000......

I guess my real question is can someone please explain to me what the difference is between "Allowable flow - gpm" and "Theoretical discharge" I have to admit my experience is a little limited in this area so I am just going based off what I read and charts I found, but the reason I ask is...

See attached for basic schematic http://files.engineering.com/getfile.aspx?folder=e2f1836d-394a-471e-a1a2-fe42754d64ff&file=Fire_Pump_Layouts.pdf

All the plans I look at for a fire pump system associated with a sprinkler/standpipe system show a "Bronze check valve w/ 3/32" orifice in caliper" in line with the take off coming coming off the discharge line of the pump and going to the fie pump controller. What is the reason for such a...

wow you certainly are a wealth of info. thank you very much

wow awesome thanks for the help the other thing is according to the code we can use sch 10 pipe (.134 in) for up to 6" and 300 psi do you know of any info against this ? thanks

Just a general question. We are putting in a fire pump in a 12 story building in NYC the plans call for check valves but dont specify if the check valves have to be spring or swing. I checked NFPA 13,14, and 20 and it doesnt give any info on what type of check valve it has to be. Can we use...

Thank you very much connectegr excellent info.

Thanks for the link connectegr. Below is a beam from one on the pages. Starting from the lower left corner: 1-a9 = 1 a9 in this case its an L4x3-1/2x5/16 8-1/2 long NS/FS = Near Side and Long Side - what do those refer to ? 2-3/8 GOL - What does GOL stand for and what is 2-3/8 referring...

Haha - good point. Fear not - I am not reviewing them, they were already signed and stamped by our PE. I am just involved in ordering the steels and the fabrication. The fact that I have an ME degree has little to do with my role here :) Thanks

Hi I need to find a book that explains shop drawings for structural steel. We just got the drawings for our building but I am not familiar with a lot of terms. Is there a book that I can read that will explain some of this stuff. All the connections are bolted - there will be no welding on the...